Remove unused OIIO_NOTHROW macro -- should use C++11 'noexcept' instead (#1736)
Remove unused OIIO_NOTHROW macro -- should use C++11 'noexcept' instead (#1736)

Obsolete -- this is the standard noexcept declaration in C++11.
We don't seem to use it anywhere, so I'm going to take a chance and
just remove it straightaway, rather than deprecating it.
OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio,OpenImageIO/oiio